| 摘要 |
<p>12 A stand-off cell (2) for an ultrasonic scanner head (1) has a slit (3) in which a biopsy needle (4) can be guided. The whole introduction will therefore take place in the supervision area (8, 8') of the scanner head (1) so that the needle can be guided in a secure manner when making a biopsy. The stand-off cell (2) can be made of a plastics with the same acoustic impedance as tissue and can therefore be manufactured very cheaply. After the needle (4) is introduced the stand-off cell (2) can be removed as the needle (4) slides out through the slit (3). This makes the biopsy easier and makes it possible to utilize the scanner head in the best way. (fig. 4)</p> |
